StackPanel myStackPanel = new StackPanel();
//Create TextBox
TextBox myTextBox = new TextBox();
myTextBox.Width = 200;
// Put some initial text in the TextBox.
myTextBox.Text = "Initial text in TextBox";
// Set the maximum characters a user can manually type // into the TextBox.
myTextBox.MaxLength = 500;
myTextBox.MinLines = 1;
// Set the maximum number of lines the TextBox will expand to // accomidate text. Note: This does not constrain the amount of // text that can be typed. To do that, use the MaxLength property.
myTextBox.MaxLines = 5;
// The text typed into the box is aligned in the center.
myTextBox.TextAlignment = TextAlignment.Center;
// When the text reaches the edge of the box, go to the next line.
myTextBox.TextWrapping = TextWrapping.Wrap;
myStackPanel.Children.Add(myTextBox);
this.Content = myStackPanel;